import type { AutoPollOptions } from "./ConfigCatClientOptions.js";
import type { FetchResult } from "./ConfigFetcher.js";
import type { IConfigService, RefreshResult } from "./ConfigServiceBase.js";
import { ClientCacheState, ConfigServiceBase } from "./ConfigServiceBase.js";
import type { ProjectConfig } from "./ProjectConfig.js";
export declare const POLL_EXPIRATION_TOLERANCE_MS = 500;
export declare class AutoPollConfigService extends ConfigServiceBase<AutoPollOptions> implements IConfigService {
    private initialized;
    private readonly initializationPromise;
    private signalInitialization;
    private stopToken;
    private readonly pollIntervalMs;
    private readonly pollExpirationMs;
    readonly readyPromise: Promise<ClientCacheState>;
    constructor(options: AutoPollOptions);
    private waitForInitializationAsync;
    protected waitForReadyAsync(): Promise<ClientCacheState>;
    getConfigAsync(): Promise<ProjectConfig>;
    refreshConfigAsync(): Promise<[RefreshResult, ProjectConfig]>;
    dispose(): void;
    protected onConfigFetched(fetchResult: FetchResult, isInitiatedByUser: boolean): void;
    protected goOnline(): void;
    private startRefreshWorker;
    private stopRefreshWorker;
    private refreshWorkerLogic;
    getCacheState(cachedConfig: ProjectConfig): ClientCacheState;
}